JP5959386B2 - 樹脂封止型半導体装置およびその製造方法 - Google Patents
樹脂封止型半導体装置およびその製造方法 Download PDFInfo
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- JP5959386B2 JP5959386B2 JP2012209887A JP2012209887A JP5959386B2 JP 5959386 B2 JP5959386 B2 JP 5959386B2 JP 2012209887 A JP2012209887 A JP 2012209887A JP 2012209887 A JP2012209887 A JP 2012209887A JP 5959386 B2 JP5959386 B2 JP 5959386B2
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- 239000004065 semiconductor Substances 0.000 title claims description 87
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000007789 sealing Methods 0.000 claims description 54
- 229920005989 resin Polymers 0.000 claims description 53
- 239000011347 resin Substances 0.000 claims description 53
- 238000007747 plating Methods 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000001039 wet etching Methods 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 229910001111 Fine metal Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 239000011135 tin Substances 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 description 13
- 238000009713 electroplating Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007772 electroless plating Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Description
まず、ダイパッド部上に搭載された半導体素子と、前記ダイパッド部にその先端部が対向して配置された複数のリード部と、前記半導体素子の電極と前記リード部とを接続した金属細線と、前記ダイパッド部と半導体素子と前記リード部を封止樹脂で部分的に封止した樹脂封止型半導体装置であって、前記ダイパッド部の底面部と前記リード部の底面部と外側面部と上側端部が前記封止樹脂から露出しており、前記露出したリード底面部およびリード上側端部にメッキ層を有していることを特徴とする樹脂封止型半導体装置とした。
また、前記リード底面部のメッキ層および前記リード上側端部のメッキ層は、鉛、ビスマス、スズ、銅、銀、パラジウム、金のいずれか一つの金属層もしくは2つ以上の合金層からなることを特徴とする樹脂封止型半導体装置とした。
また、前記メッキ層を有するリード上側端部と封止樹脂との間に空間部が設けられていることを特徴とする樹脂封止型半導体装置とした。
図2(a)に示すように、フレーム内に半導体素子が載置される矩形状のダイパッド部12とそのダイパッド部12に先端部が対向して配置された複数のリード部13とを1ユニットとして、そのユニットを複数有した銅材よりなるリードフレームを用意する。リードフレームの底面側には、封止シート15が貼付されており、この封止シート15はリード部13の底面に封止樹脂が回り込まないように保護し、リード部13の底面を露出させるための機能部材になる。
上記説明では、封止シート15を図3(e)で行うとしたが、図3(f)のウェットエッチングの後、すなわち、メッキ層17形成前に行なっても良い。
12 ダイパッド部
13 リード部
14 金属細線
15 封止シート
16 封止樹脂
17 メッキ層
18 ハンダ
19a リード底面部
19b リード上側端部
19c リード外側面部
20 実装基板
21 ランド部
22 ウェットエッチング部
Claims (8)
- ダイパッド部と、
前記ダイパッド部上に搭載された半導体素子と、
前記ダイパッド部に対向して配置された複数のリード部と、
前記半導体素子の複数の電極と前記複数のリード部とを接続している金属細線と、
前記複数のリード部が部分的に露出するように、前記ダイパッド部、前記半導体素子および前記複数のリード部を封止している封止樹脂と、を有し、
前記複数のリード部は、前記封止樹脂から露出した、底面であるリード底面部と先端であるリード外側面部と上面の一部であるリード上側端部とを備えており、
前記リード底面部は前記封止樹脂の底面と同一面内にあり、
前記リード底面部および前記リード上側端部はメッキ層を有しており、
前記リード上側端部の鉛直上方には前記封止樹脂の下の空間部を介して前記封止樹脂が存在することを特徴とする樹脂封止型半導体装置。 - 前記メッキ層を有するリード上側端部の断面が円弧形状で形成されることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 前記リード底面部のメッキ層および前記リード上側端部のメッキ層は、鉛、ビスマス、スズ、銅、銀、パラジウム、金のいずれか一つの金属層もしくは2つ以上の合金層からなることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 前記複数のリード部は前記封止樹脂の下において、前記リード外側面部に近づくに従って厚みが薄くなることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 前記ダイパッド部の底面部が前記封止樹脂から露出していることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- 前記リード外側面部が前記封止樹脂の側面よりも外側に突出していることを特徴とする請求項1に記載の樹脂封止型半導体装置。
- ダイパッド部および前記ダイパッド部に対向して配置された複数のリード部を1ユニットとして、そのユニットを複数有したフレームもしくは電鋳基板を準備する工程と、
前記フレームもしくは電鋳基板の前記ダイパッド部の各々に半導体素子を搭載し、前記リード部と前記半導体素子表面の電極を金属細線で接続する工程と、
前記複数のリード部の底面部が露出するように、前記ダイパッド部と前記半導体素子と前記リード部とを封止樹脂により樹脂封止する工程と、
樹脂封止された前記フレームもしくは電鋳基板の各ユニットの境界部分の前記リード部の切断箇所において、前記封止樹脂の上面側から回転ブレードによりリードプリカットを行い、前記リード部の一部を残して前記切断箇所に凹部を形成する工程と、
前記凹部の表面をウェットエッチングして前記封止樹脂の下となる領域までリード上側端部を形成する工程と、
ウェットエッチングした後の前記フレームもしくは電鋳基板をメッキ浴に浸して前記リード底面部と前記リード上側端部にメッキ層を形成する工程と、
前記切断箇所において、回転ブレードもしくは切断パンチにより、前記メッキ層が形成された前記リード部の残りの部分を切断してフルリードカットを行い、個々に分離する工程と、
からなることを特徴とする樹脂封止型半導体装置の製造方法。 - 前記ダイパッド部と前記半導体素子と前記リード部とを樹脂封止する工程は、前記ダイパッド部の底面部を露出することを含む請求項7記載の樹脂封止型半導体装置の製造方法。
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TW102130602A TWI587457B (zh) | 2012-09-24 | 2013-08-27 | 樹脂密封型半導體裝置及其製造方法 |
US14/030,100 US8994160B2 (en) | 2012-09-24 | 2013-09-18 | Resin-encapsulated semiconductor device and method of manufacturing the same |
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CN201310436876.6A CN103681577B (zh) | 2012-09-24 | 2013-09-24 | 树脂密封型半导体装置及其制造方法 |
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